peoples features changing

When i'm talking to some one or see people out in public their features change they can have say short blond hair then while i'm talking to them or looking at them their hair will go long and a different colour or style. Same to with their eye colour they can have say blue eyes then will change to brown or green. Their figure changes shape. Their features on their face changes shape. I don't recognise the i know and the ones i don't know i think it's the ones i know. I will will say hello to them and walk by the ones i know because i don't recognise them. If the ones i know and they have some thing different about them like dying their hair a different colour or wearing glasses or a different pair of glasses i'm unable to recognises them. I've got in to the wrong car a few times because it looked like the one i got out of and had to go back in to. My medication isn't doing this. I don't take drugs or drink i'm not a sniffer. Is any of this to do with ADHD or Autism? Does any body else experience this? Why does it happen and what's it called? How is is treated if it can be treated?